Wins
2
Indexed tournament wins
Player record
Costlow, William
Losses
7
Indexed tournament losses
Matches
9
Decisive results
Win rate
22.2%
Across indexed matches
Peak rating
865
Highest rating in the available history.
Biggest upset
Not enough data
No qualifying upset available.
Biggest loss
Toombs, McKinley
Pensacola Winter Open · Dec 2, 2006 · -2 rating
Open →Most frequent opponent
Bocanegra, Jose
1 match
Open →Rating trajectory
Published rating movement across recorded events.
Rating history unavailable
More published rating points are needed before a trajectory can be drawn.
Tournament history
1 tournament appearances · synced Aug 11, 2026, 2:28 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Dec 2, 2006 | Pensacola Winter OpenTournament · View matches | 871 | 865 | -6 | 2W / 7L |
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